[GCS FT] Update Redis connection configs (#40860)

## Why are these changes needed?

```
RAY_CONFIG(int64_t, redis_db_connect_retries, 120)
RAY_CONFIG(int64_t, redis_db_connect_wait_milliseconds, 500)
```

`redis_db_connect_retries * redis_db_connect_wait_milliseconds` is not the upper bound but the lower bound for the timeout of reconnection. Check the function [ConnectWithRetries](https://sourcegraph.com/github.com/ray-project/ray@ray-2.7.1/-/blob/src/ray/gcs/redis_context.cc?L360) for more details.

In my experiments, the combination of `redis_db_connect_retries = 600` and `redis_db_connect_wait_milliseconds = 100` takes 13 mins to fail. See [this gist](https://gist.github.com/kevin85421/271841ddc5816340765a44520de834c1) for more details about the experiment. The combination of `redis_db_connect_retries = 120` and `redis_db_connect_wait_milliseconds = 500` takes 3m10s to fail. See [this gist](https://gist.github.com/kevin85421/63fc2936430472213396c59e1a8a7783) for more details.

src/ray/common/ray_config_def.h

@@ -321,9 +321,9 @@ RAY_CONFIG(int, worker_oom_score_adjustment, 1000)
 /// NOTE: Linux, Unix and MacOS only.
 RAY_CONFIG(int, worker_niceness, 15)
 
-/// Allow up to 60 seconds for connecting to Redis.
-RAY_CONFIG(int64_t, redis_db_connect_retries, 600)
-RAY_CONFIG(int64_t, redis_db_connect_wait_milliseconds, 100)
+/// Allow at least 60 seconds for connecting to Redis.
+RAY_CONFIG(int64_t, redis_db_connect_retries, 120)
+RAY_CONFIG(int64_t, redis_db_connect_wait_milliseconds, 500)
 
 /// Number of retries for a redis request failure.
 RAY_CONFIG(size_t, num_redis_request_retries, 5)